Issue |
EPL
Volume 96, Number 2, October 2011
|
|
---|---|---|
Article Number | 26002 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
DOI | https://doi.org/10.1209/0295-5075/96/26002 | |
Published online | 16 September 2011 |
Phonon generation in condensed 4He by laser-excited atomic bubbles
Department of Physics, University of Fribourg - Chemin du Musée 3, 1700 Fribourg, Switzerland
Received:
6
July
2011
Accepted:
26
August
2011
We discuss the interaction between nanometer-sized defects (atomic bubbles) and elementary excitations (phonons) in quantum fluids and solids. We observe that optical excitations in embedded metal atoms induce bubble expansions/contractions that create strongly localized phonon wave packets in the quantum matrix. We derive the structure and dynamics of these vibronic excitations from the experimental laser-induced fluorescence spectra of Au and Cu atoms in liquid and solid He. The atomic vibrations are found to be strongly damped on the 50 Å and 5 ps scales in agreement with pure hydrodynamic estimations.
PACS: 67.80.dj – Defects, impurities, and diffusion / 32.70.-n – Intensities and shapes of atomic spectral lines / 63.20.kp – Phonon-defect interactions
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.